Method of manufacturing and finishing leather



NITED STATES PATENT OFFICE.

CHRISTIAN EUGENE LAPPE AND HENRY A. LAPPE, OF PITTSBURG, PENNSYLVANIA.

METHOD OF MANUFACTURING AND FINISHING LEATHER.

SPECIFICATION forming part of Letters Patent No. 622,926, dated April 11, 1899.

Application filed November 21, 1898. Serial No. 696,975- (No specimens.)

v ishing leather.

u r process particularly relates to the man ufacturing and finishing of leather which is adapted for use for the Vamps and tops of shoes and may be advantageously employed for the manufacturing of other articles.

The leather produced by our process possesses decided advantages over the leathers heretofore manufactured in cheapness, durability, utility, and general appearance,-a11d particular attention is directed to the inner 0r flesh side of the leather, which is colored a dull blue-black, giving it a distinctiveappearance, which is so desirable, and, furthermore, assisting materially to lessen the cost of its manufacture.

The process finally consists in the novel succession of steps hereinafter described, whereby the calf or kangaroo skin or hide when finished is adapted for the above purposes.

The process or steps used for the finishing of a calf or kangaroo skin or hide into a leather adapted for the above uses is as follows: An unstuffed calf or kangaroo skin or hide, tanned by a gambier,quebracho, or other vegetable tanning process, is stufied to its proper consistency by the use of fat liquor and then dried in the usual manner. The inner or flesh side of the calf or kangaroo skin orhide is colored a blue-black by any desirable composition. After the flesh or inner face of the skin or hide is blue-blacked the outer or grained face thereof is colored a jet black by any'desirable composition. After the outer and inner face of the calf or kangaroo skin or hide has been colored as desired the same is then slicked out smooth to set out the grain on its outer or grained face. It is then dried in the well-known manner. The skin or hide is then staked and trimmed in the ordinary way. The calf or kangaroo skin or hide after it has been staked and trimmed as set forth is seasoned by the use of bluemonia, blood, and nigrosine, the proportions being as follows: blue-stone, one-half pint; iron, one-eighth ounce; logwood, one-half pint; blood, one pint; nigrosine, one-half pint. The skin or hide after it has been seasoned is again dried atthe temperature of 120 to 180 Fahrenheit. The skin or hide is then glazed in any desirable manner. The skin or hide after it has passed through the glazing process for the third time is again staked. Afterit has been staked it is seasoned by the use of blue-stone, iron, logwood, am monia, blood, and nigrosine, the proportions being as follows: blue-stone, one-half pint; iron, one-eighth ounce; logwood, one-half pint; blood, one pint; nigrosine, one-half pint. The skin or hide after it has been seasoned is again dried at the temperature of 120 to 180 Fahrenheit. After the drying process it is glazed in any desirable manner, and the finished product is ready for the market.

The leather produced by the foregoing process has an unusually high-polished grained surface and possesses all the qualities of the ordinary leathers now in the market. It has the appearance of patent or enamel leather to a great extent, as well asglazed kids and other glazed leathers. At the same time when in use the leather will be free from excessive cracking or breaking, which is usual in pat= cut or enamel leathers.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-- The herein-described improved method of manufacturing and finishing leather which then suitably glazing to produce the finished 10 consists in stuffing and drying a tanned skin product, substantially as herein set forth.

or hide, subjectingthe same on the grain side In testimony whereof We aflix our signato a composition of jet-black coloring matter, tures in the presence of two Witnesses.

5 then slicking drying and staking the same, CHRISTIAN EUGENE LAPPE.

subjecting the skin or hide to a seasoning HENRY A. LAPPE. composition of blue-stone, logwood, iron, am- Witnesses: monia, blood and nigrosine, then drying in a H. O. EVERT,

temperature of 120 to 180 Fahrenheit, and E. W. ARTHUR. 

